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Pesjak, Lea; McMinn, Andrew; Chase, Zanna; Bostock, Helen C (2023): Relative abundance of diatom species, biogenic silica and Si/Al over last ~140 kyr, from the East Antarctic continental margin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.946549

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Abstract:
This dataset contains relative abundance (%) of diatom species, and includes the Eucampia antarctica terminal/intercalary valve ratio (Eucampia index), biogenic silica and Si/Al values from core TAN1302-44, which was collected from the WEGA channel on the continental slope, offshore Adélie Land, East Antarctica. Diatoms were analysed at 10 cm, resolution within interval 350-5 cm-depth, while biogenic silica was analysed every 20 cm, and Si/Al (X-ray Flourescence scanning, XRF) comprises a 3-point average, from every 0.2 cm, of entire core. The data also includes four radiocarbon dates, calculated from 0 cm, 25 cm, 35 cm and 45 cm- depths; Shannon-Wiener biodiversity index based on all species identified, and principal component analysis based on species identified at >1.8% relative abundance (in at least two samples). The main purpose of this dataset compilation was to understand the distribution of species, and species assemblages. The interpretation of the data sets suggests changes in Antarctic sea ice and ocean circulation occured near the ice sheet, over the last glacial cycle. These changes are especially evident in the last glacial, and during the last deglacial (warming).
Keyword(s):
Antarctic continental margin; diatoms; Glacial cycles; Paleoceanography; Sediment core
Supplement to:
Pesjak, Lea; McMinn, Andrew; Chase, Zanna; Bostock, Helen C (2023): Sea ice and productivity changes over the last glacial cycle in the Adélie Land region, East Antarctica, based on diatom assemblage variability. Climate of the Past, 19(2), 419-437, https://doi.org/10.5194/cp-19-419-2023
Coverage:
Latitude: -64.912500 * Longitude: 144.544333
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
6 datasets

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Datasets listed in this bundled publication

  1. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Age deteremination of core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946527
  2. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Biogenic silica of sediment core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946526
  3. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Relative diatoms abundance of sediment core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946531
  4. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Shannon-Index of sediment core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946532
  5. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Silicon/Aluminium ratio of sediment core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946534
  6. Pesjak, L; McMinn, A; Chase, Z et al. (2023): Statistic analysis (Principal component) of sediment core TAN1302-44 from Adélie Land, East Antarctica. https://doi.org/10.1594/PANGAEA.946536